Having trouble printing a new 1.75mm filament drive

[iphands]

Hi, I am trying to print a filament drive that has additional mounting holes for some fancy duct work.
http://www.thingiverse.com/thing:301333

The main issue I have is the hot end does not seem to seat in so that the filament hole lines up with the parts filament hole.
Its as if the part is too small in some dimension and thus the hot end will not go far enough into the part.

I can shine some light above the hot end assembly, stare down the tube where the filament would travel, and see that the holes are not lining up.
The attached image shows how they are slightly misaligned. The grey area would be the part, and the black area the hole in the top of the hot end assembly.

The main issue I have is I have no idea where the hot end assembly is stuck. It is maddening trying to sand a little away and getting no where. I've busted out the power tools (rotating brush) and sanded a little too much, even then though the holes would not line up.

Also as best I can tell the new parts STL has more space for the hot end than the part found here: https://github.com/MakerGear/M2/blob/ma ... 1.75mm.stl
So I should have an even looser fit!

Has anyone had similar issues printing a new filament drive?

I am printing the unmodified part tonight just to see if it fits when printed from my machine.

Thanks.

[iphands]

D'OH. I changed quite a few settings printed a few parts and I am all good now.

While I am not sure what did it, I changed:
- layer height to .15mm (from .25mm)
- generate extra perimeters to off
- detect thin walls off
- extra perimeters off
- increased minimum perimeters to 6

And printed veeeerrrryy slowwwwly. Now the hot end input hole lines up perfectly with the parts holes.

Now my M2 has a nice new black filament drive housing with extra fan/duct mounting holes!

[Levi8than]

I know Makergear ships their drives printed from ABS.
I'm curious if the lower end of this heads up at all or if PLA would be fine.
Did you print it in ABS or PLA?

[Capt. John]

I've had to press fit the hot end into the drive piece with a vice to have a straight shot for
the filament into the hot end.

[Levi8than]

I think the hot ends are a little expensive for me to want to crank a vice on it.